A CMOS melody generator IC is used to synthesize 5~ 12 popular melodies. The IC can be programmed to operate in various modes . For this kit, two buttons are provided. The "repeat" button starts the same melody that was last played whereas the "select" button causes the circuit to play a different tune every time. Comes with Volume control trimmer pot.
(battery holder & 2 1/4 inch 8 ohm speaker included)
Click here for UM348x datasheet (pdf)